Helsinki, Finland Weather
Helsinki hourly forecast: next 24 hours
Today's high of 62°F (17°C) is right in line with the typical September high of 60°F (15°C).
Current conditions in detail
Helsinki weather tomorrow (Thursday, September 17)
Tomorrow in Helsinki looks patchy rain nearby, with a high of 62° and an overnight low of 52°. There is a 67% chance of rain - plan accordingly. Winds top out near 13 mph, and the UV index reaches 2 (low).
Helsinki 14-day forecast
About the weather in Helsinki
Cold is the baseline in Helsinki, not the exception. Night-time lows sit at or below freezing in 4 months of the year, and the warmest month, July, still only averages 69°F (20°C) by day. January runs to 22°F (-6°C) after dark.
Helsinki weather: quick facts
- Hottest month: July - highs near 69°F (20°C)
- Coldest month: January - highs near 30°F (-1°C)
- Decade extremes (2015-2024): 88°F (31°C) high · -14°F (-26°C) low
- Wettest month: August (13 rainy days) · Sunniest: June (14.7 h sun/day)
- Climate type: humid continental
- Annual swing: 21°C between the average warmest and coolest month · day to night: 6°C
- Snow: about 34 days a year
- Months with freezing average lows: 4
- Average humidity: 80%
Temperatures through the year
January bottoms out at 30°F (-1°C) in daylight, 22°F (-6°C) after dark. July is the warm end of the year, averaging 69°F (20°C) by day and 57°F (14°C) overnight. The gridded 2015-2024 daily record for this location tops out at 88°F (31°C) and bottoms at -14°F (-26°C) - decade extremes, not all-time station records. Precipitation concentrates in August - 3.3 inches (83 mm) on 13 days - and thins out by April.
Rain, sun and snow
Snow falls on roughly 34 days a year, mostly November through April. Relative humidity averages 80% across the year, more humid than roughly 84% of the cities we track. Overnight lows average at or below freezing for 4 months, December through March. Sunshine averages 7.5 hours a day over the year - duller than all but 7% of the 3496 cities in our dataset, peaking in June at 14.7 hours.
Season by season
Spring (March through May)
Spring in Helsinki runs cold, with daytime highs averaging 46°F (8°C) and nights around 34°F (1°C); expect showers on roughly 30 days across the season, plus about 7 snowy days.
Summer (June through August)
Through summer, Helsinki stays on the cool side of mild: 68°F (20°C) by day, 56°F (13°C) after dark, and rain falls on around 36 of the 90 days. Daylight is generous - around 13.1 hours of sun a day.
Fall (September through November)
Fall in Helsinki is chilly, with daytime highs averaging 49°F (10°C) and nights around 42°F (5°C); rain falls on around 38 of the 90 days, plus about 4 snowy days.
Winter (December through February)
Winter is frigid here - highs near 32°F (0°C), nights near 24°F (-4°C), and rain falls on around 40 of the 90 days, plus about 23 snowy days. Sun is scarce, averaging 2.1 hours a day. Wind sharpens cold like this considerably; pair the forecast winds with the wind speed converter to judge exposed conditions.
Average temperatures in Helsinki by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 30° | 22° | 14 | 2.7 in | 1.4 h/day | 86% |
| February | 31° | 23° | 12 | 2.5 in | 3.6 h/day | 86% |
| March | 35° | 26° | 11 | 1.8 in | 6.6 h/day | 83% |
| April | 45° | 33° | 10 | 1.8 in | 9.9 h/day | 76% |
| May | 57° | 43° | 9 | 1.9 in | 13.0 h/day | 70% |
| June | 66° | 53° | 10 | 2.2 in | 14.7 h/day | 70% |
| July | 69° | 57° | 13 | 3.1 in | 13.3 h/day | 76% |
| August | 68° | 57° | 13 | 3.3 in | 11.2 h/day | 79% |
| September | 60° | 51° | 11 | 2.7 in | 8.2 h/day | 81% |
| October | 48° | 40° | 13 | 3.1 in | 4.8 h/day | 84% |
| November | 40° | 34° | 14 | 3.1 in | 2.0 h/day | 87% |
| December | 34° | 28° | 14 | 2.6 in | 1.3 h/day | 87% |